Door Arm Rest Week 8 Challenge

1).

DOOR ARMREST

AIM: CREATION OF DOOR ARMREST AND ADD THICKNESS OF 2.5 mm

In an automotive context, an armrest (or armrest) is a feature found in many modern vehicles on which occupants can rest their arms.

Tooling Axis:

It is the direction in which the component will be ejecting after the molding process is completed. The direction of the tooling axis should clear the maximum portion of the part.

It should be selected in such a way that number of side cores will be minimum as it will add more cost to the process.

Workbench and tools used

Generative shape design Extract

Extrapolate Join

Trim Offset Boundary Edge fillet

Intersection Sweep

Close surface

Feature Draft Analysis

Design Process in CATIA V5

Given Data, Class A surface,

Now we will be doing a Draft analysis on Class ‘A’ Surface, for that, we need tooling Axis.

Tooling Axis creation: Bisecting Method

First, we will extract the base surface of class ‘A’ and on that create the point and then create the Axis system at that point. As we have only three sidewalls, we need to create a tooling axis with a different method.

Then creating intersection curves in the X direction and creating sidelines on that curves and then creating the bisecting line in

sketcher.

Then create intersection curves in the Y direction and create sidelines on that curves here we have only one side wall so we will create a line passing through the point which we have created in the above steps at an angle of the draft in the sketcher. Here angle taken is 5 degrees to get all faces feasible with tooling direction.

Then create a bisecting line through X and Y direction tooling lines.

After that create the dummy tooling axis in the Z direction. This line is the Dummy tooling axis for our part.

Compass Method:

Checking draft analysis with dummy tooling axis and if tooling axis is not correct then adjusting compass to get the surfaces as green.

Then right-click - lock current orientation - cancel draft analysis - select line - line direction - compass direction. Then View - Reset compass

This line will be the Main tooling axis.

Creating Different tooling axis for Cavity and Adjusting with compass then creating a line with compass direction in Y-direction which is for Slider.

‘B’ Surface Creation:

Extract Class ‘A’ Surface. Untrim extracted surfaces. Extrapolate to some extent.

Use the trim and select the proper surface. Offset inward at 2.5 mm

Use edge fillet.

'C’ Surface Creation:

Take outer boundary using Boundary command of class ‘A’ surface Use Smooth curve.

Use sweep command to create a surface using tooling axis and draft angle as 3 degrees. Create points and lines to split the surfaces as and where ever needed

Join the split surfaces with multi-section surfaces.

Final Body creation:

Join class ‘A’ surface and ‘C’ surface.

Trim the resulting surface with the ‘B’ surface.

Join the surface.

The result is completely close surface.

Final Draft Analysis:

Z-direction axis,

Y-direction axis,

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